Experimental study on the degradation of interlaminar shear performance of FRP bars in different corrosive environments

WANG Zike; DUAN Jianxin; ZHAO Jun; YANG Yongming

doi:10.13801/j.cnki.fhclxb.20230822.001

Volume 41 Issue 4

Apr. 2024

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Article Navigation > Acta Materiae Compositae Sinica > 2024 > 41(4): 2031-2042

WANG Zike, DUAN Jianxin, ZHAO Jun, et al. Experimental study on the degradation of interlaminar shear performance of FRP bars in different corrosive environments[J]. Acta Materiae Compositae Sinica, 2024, 41(4): 2031-2042. doi: 10.13801/j.cnki.fhclxb.20230822.001

Citation:

WANG Zike, DUAN Jianxin, ZHAO Jun, et al. Experimental study on the degradation of interlaminar shear performance of FRP bars in different corrosive environments[J]. Acta Materiae Compositae Sinica, 2024, 41(4): 2031-2042. doi: 10.13801/j.cnki.fhclxb.20230822.001

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Experimental study on the degradation of interlaminar shear performance of FRP bars in different corrosive environments

doi: 10.13801/j.cnki.fhclxb.20230822.001

1.
School of Mechanics and Safety Engineering, Zhengzhou University, Zhengzhou 450001, China
2.
School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China

Funds: National Natural Science Foundation of China (52278282); Program for Innovative Research Team in University of Minister of Education of China (IRT_16R67); Key Scientific Research Project of College and University in Henan Province (21A560012); Key R&D and Promotion Special Project in Henan Province (Tackling Key Scientific and Technological Problems) (222102320081)

Received Date: 2023-06-21
Accepted Date: 2023-08-12
Rev Recd Date: 2023-08-01

Available Online: 2023-08-22

Publish Date: 2024-04-15

Abstract

Abstract

In this paper, the performance deterioration of basalt-, glass- and carbon-fiber reinforced polymer (BFRP, GFRP and CFRP) bars in five kinds of corrosive solution environments, i.e., water, strong alkali solution (pH=12.8), weak alkali solution (pH=11), simulated seawater and acid solution (pH=1.5), was investigated. The deterioration patterns of fiber-resin interfacial bonding properties, microstructure and chemical composition of FRP bars at different aging temperatures (20, 40 and 55℃) and corrosion periods (1, 2, 3, 6 and 9 months) were investigated by interlaminar shear strength, water absorption, DMA, FTIR and SEM tests. The test results show that the interlaminar shear strength of FRP bars is significantly affected by the corrosive environment, and the deterioration rate of FRP specimen in the strong alkali solution is much higher than the other four solutions. The reason is that the high concentration of OH⁻ ions accelerates the hydrolysis and etching reaction of FRP bars, causing a large number of fibers and resin debonding, which eventually leads to the reduction of interlaminar shear strength. Compared with BFRP bars and GFRP bars, CFRP bars have relatively excellent durability and higher interlaminar shear strength retention ratio under the same aging conditions.
- FRP bar,
- corrosion environment,
- interlaminar shear strength,
- moisture uptake,
- FTIR,
- DMA
Long Abstrsct
Innovation Points

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References(26)

References

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